Bear Grylls wants to go on an adventure with US President Donald Trump.

Bear Grylls

Bear Grylls

The 42-year-old TV star - who previously shared the spotlight with Barack Obama on his NBC programme 'Running Wild with Bear Grylls' - has admitted Trump would be a dream guest on one of his shows, but he's not sure the President would be well suited to the task.

He said: "It would be amazing. Of course. And, there's no doubting he's tenacious.

"Obama liked stepping out of his comfort zone, and that attitude is good in the wild. He told me it was one of the best days of his presidency.

"But I don't know ... Donald Trump is a person who likes to be king and the one thing I've learnt in the wild is you're never the king. You've got to learn to put the crown down."

Bear also conceded that Trump has probably got bigger issues on his mind at the moment.

He told the Radio Times: "I kind of hope he's got more important things to do than to go on an adventure with me."

Meanwhile, Bear has credited his career success to his own determination, admitting he wasn't blessed with natural athleticism or intelligence.

The adventurer shared: "I was never very brilliant at school. Never the sportiest or the cleverest, but the one thing I could control was I could be determined.

"The SAS was the first time I really proved that to myself, when I passed selection. And ever since I have learnt on that feeling, that if I hang on in there I can do it."

Bear said, too, that his time at boys' boarding school Eton in England played a big part in his personal development.

He recalled: "I look back on that time and think it gave me some of my strongest memories and best friends of my life.

"It was a totally forward-thinking, progressive school and I am always grateful to them."